OPTP Slant boards are integral in the prevention and treatment of common lower-leg and foot problems such as Achilles tendonitis, heel spurs, shin splints, calf strains, plantar fasciitis, overuse syndromes and post-surgery contraction. They're perfectly suited for stretching and weight-bearing exercise at home or in a clinic. These lightweight, but sturdy, slant boards are constructed of special weight-bearing foam, making them easier-to-handle and more cost-effective compared to wooden, metal or plastic boards. 18 degree incline. Latex-free. Sold in pairs.